<template>
  <div id="app">
    <!--  这个有啊 -->
    <router-view v-if="isRouterAlive" />
  </div>
</template>
<script>
  export default {
    name: 'app',
    provide() {//全局注册方法  
      return {
        reload: this.reload
      }
    },
    data() {
      return {
        isRouterAlive: true,//显示状态  
      }
    },
    methods: {
      reload() {
        this.isRouterAlive = false;
        this.$nextTick(function () {
          this.isRouterAlive = true;
        })
      },

    }
  }  
</script>
<style lang="scss">
  #app {
    font-family: Avenir, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-align: center;
    color: #2c3e50;
  }

  #nav {
    padding: 30px;

    a {
      font-weight: bold;
      color: #2c3e50;

      &.router-link-exact-active {
        color: #42b983;
      }
    }
  }
</style>